What was found
BURNING ODOR IN AFT GALLEY ON TAXI OUT. REPEAT ISSUE. DISSIPATED ON TAXI BACK TO GATE.IAW AMM 05-51-26-800-801-C1 FROM 46-6020 FILLED OUT BY FLIGHT CREW AND CABIN CREW. PERFORMED VISUAL INSP. OF GALLEY OVERHEARD WIREING THRU LIGHTING ACCES PANELS NO ODOR OR DISCREPANCIES NOTED. REMOVED O/B COFFEE WARMER AND BOTH COFFEEMAKERS INSP. WIREING AND COMPONENTS NO DISCREPANCIES REINSTALLED AND OPS CHECKED. OPENED POWER SUPPLY GALLEY 4 ELEC. CONTROL MODULE INSP. NO ODOR OR DISCREPANCIES. RAN #1 & 2 ENGINES BOTH PACKS ON SINGLE ENGINE AND BOTH GEN. BUSSES ON SINGLE ENGINE 95 AMPS. NO ODOR OR DISCREPANCIES NOTED REF. AMM 05-51-26. PERFORMED AFT. AREA DOOR HEATER OPERATIONAL CHECK REF. AMM 21-45-00-700-802. NO DISCREPANCIES OR ODOR FROM OULETS IN AFT GALLEY. PERFORMED OPERATION OF L& R PACKS APU AIR SOURCE WITH BAY DOORS OPEN VISUAL INSP. AND NO UNUSAL SOUNDS OR ODOR NO DISCRPANCIES PACK BAY DOORS SUCURED CLOSED. REF. AMM 21-00-00-800-803. PERFORMED SECOND #1&2 ENGINE RUNS BLEEDS ON ENGINE GENS. ONLINE FRQS./VOLTS GOOD. APU BLEED OFF ISO. CLOSED AND WITH SINGLE ENG. BOTH BUSS AND SINGLE ENG. BOTH PACKS NO ODOR OR DISCRPANCIES. SHUTDOWN APU WITH ENGS. ON BLEEDS AND GENS. ON AS DESCRIBED IN DEBRIEF NO ODOR OR DISCRPANCIES CABIN OR AFT. GALLEY. PERFORMED CONTAMINATION ENGINES BLEED SOURCE FROM A/C PACKS AND DUCTS DOWNSTREAM OF PACKS REF. AMM SUBTASK 21-00-01-860-006. OPERATIONAL CHECKED OF 4 EACH AFT. GALLEY OVENS NO ODOR OR DISCREPREPLACED. WITH TOMC CONCURRENCE AIRCRAFT OK FOR SERVICE.